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2014-10-20T17:32:25+03:00
7x2¹⁹⁹⁷-6x2¹⁹⁹⁶-2x2¹⁹⁹⁸=
= 2¹⁹⁹⁶x(7x2-6-2x2²)=
2¹⁹⁹⁶x (14 -6 -8)=
=
2¹⁹⁹⁶x 0 =
=0